Umbral Domains: Mage
Canon Compatible
New/Revised Powers
Alternate Spheres
Spheres (version 1) - One attempt at a revised Sphere system (still in progress).
New Rotes
New/Revised merits
Other Assorted Stuff
Rules
Two Step Casting for Mage effects - Based on the the Changeling Morphean Arts system.
Settings & Setting Elements
Canon Incompatible
Powers
Rules
Settings
Recommended Reading
White Wolf
Other Publications
0X - Piers Anthony
Imagica - Cliver Barker
High Sorcery - Andre Norton
Darwinia - Robert Charles Wilson
Other Media
Film
The Matrix
The Lathe of Heaven
Dark City
Butterfly Effect
Intacto
Hellraiser IV: Bloodlines (no previous experience with this series necessary)
Phantasm IV: Oblivion (no previous expierience with this series necessary)
Spirit of Wonder: the Movie
Primer
Serial Experiments: Lain
Yeelen
Pi: Faith in Chaos
Onmyoji
Neon Genesis Evangelion
Links
Mage Page - One of the older Mage websites out there, with a comprehensive array of topics and ideas, including both the canonical and brilliantly non-canonical.